添加剂对传感器用PCB环氧树脂板真空蒸镀铜层参数优化及结构的影响

为了提高传感器用PCB环氧树脂板的表面性能,利用次磷酸钠体系在其表面进行真空蒸镀铜.选择苯亚磺酸钠(SBS)与聚乙烯亚胺(PEI)作为添加剂来分析其对镀铜层性能的影响,获得更适合真空蒸镀铜工艺的添加剂.研究结果表明:在65℃下持续沉铜0.5 h,综合沉积率以及板面颜色,确定最优含量PEI为16～28 mg/L,SBS为...

Influence of Additives on Parameter Optimization and Structure of Vaccum Evaporation Copper Plating Layer of PCB Epoxy Resin Board for Sensor

In order to improve the surface performance of PCB epoxy resin board for sensor, sodium hypophosphate system was used for vacuum evaporation copper plating on its surface. Sodium benzenesulfonate SBS and polyethylenimine PEI were selected as additives to analyze their influence on the performance of copper plating layer, and the suitable additives for vacuum evaporation copper plating process were obtained. Results showed that the optimal content of PEI was 16~28 mg/L, that of SBS was 54~62 mg/L, and the vacuum evaporation copper plating temperature was 40~50 ℃ under the condition of continuous deposition of copper for 0.5 h at 65 ℃, based on the deposition rate and plate color. Copper was precipitated from the plating solution at approximately 20 min, and the vacuum evaporation copper plating solution with combined additives had the longest duration and showed the optimal stability. With additives, the coating had better microstructure and particle size became finer, and the number of holes decreased significantly, resulting in a denser structure and a smoother grain shape. The coating prepared by the combined additive had smaller porosity and better performance than that prepared by the single additive.